Powder metallurgy processes > Patents

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Class Information
Number: 419
Name: Powder metallurgy processes >
Description: This is the generic class for producing metals, alloys or metal containing compositions in a solid or compact state from powdered or particulate material with or without heating.

Class Number	Class Name	No. of Patents
419/61	Forming articles by uniting randomly associated metal particles	62
419/66	Consolidation of powders	339
419/67	Extrusion	143
419/68	Isostatic/hydrostatic pressing	137
419/69	Rolling	64
419/62	Powder pretreatment	55
419/63	Includes a chemical reaction	49
419/65	Includes adding a binder material	129
419/64	Includes coating of particles	65
419/1	Powder metallurgy processes with heating or sintering	58
419/46	Alloying occurs during sintering	150
419/38	Consolidation of powder prior to sintering	904
419/41	Extruding	137
419/42	Isostatic or hydrostatic	151
419/43	Rolling	84
419/39	Specific pressure or lack or pressure recited	216
419/40	Slip or slurry	87
419/25	Controlled cooling after sintering	111
419/48	Heat and pressure simultaneously to effect sintering	432
419/52	Heating by electrical means other than radiant energy	54
419/49	Hot isostatic pressing (hip)	484
419/50	Hot rolling	41
419/51	Multiaxial (not hip)	50
419/47	Liquid phase sintering	219
419/3	Making articles of indefinite length	94
419/4	Filaments or fibers	51
419/5	Making composite or hollow article	305
419/6	Powder next to powder	250
419/7	One or more components not compacted	72
419/8	Powder next to solid	487
419/9	Powder not compacted	210
419/2	Making porous product	394
419/10	Metal and nonmetal in final product	414
419/12	Boride containing	368
419/14	Carbide containing	313
419/15	Complex or multiple carbides	163
419/16	With another binary nonmetal	104
419/17	Single carbide	218
419/18	Tungsten carbide	190
419/13	Nitride containing	325
419/11	Nonmetal is elemental carbon	301
419/19	Oxide containing	424
419/22	Copper oxide	44
419/20	Rare earth oxide	91
419/21	Silver metal with metal oxide	82
419/53	Plural heating steps including sintering	182
419/55	Additional operation between heating steps	167
419/54	Different temperatures	354
419/26	Post sintering operation	188
419/27	Impregnation	202
419/29	Subsequent heat treatment (e.g., annealing, etc.)	413
419/28	Subsequent working	451
419/30	Powder pretreatment (prior to consolidation or sintering)	227
419/36	Addition of fugitive material	492
419/37	Additional material is solid	303
419/34	Chemical blending	85
419/35	Coating	237
419/33	Comminuting	265
419/31	Heat treatment of powder	225
419/32	Mechanical blending	259
419/23	Powder shape or size characteristics	572
419/24	Filaments or fibers	101
419/44	Pretreatment of consolidated powders	118
419/45	Sintering which includes a chemical reaction	242
419/56	Special medium during sintering	82
419/57	Special atmosphere	340
419/59	Hydrocarbon or derivative (e.g., ch4, etc.)	28
419/58	Hydrogen or hydrogen plus nitrogen (nitrogen per se in 57)	202
419/60	Vacuum	215